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(No Model.)

W. D. SMITH.

EXHAUST FAN.

No. 275,087. Patented Apr.3, 1883.

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UNITED STATES PATENT ()FFICE.

WRIGHT D. SMITH, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO MILES G. HUYATT, OF SAME PLACE.

EXHAUST- FAN.

SPECIFICATION forming part of Letters Patent No. 275,087, dated April 3, 1883. Application filed December 8, 1882. (No model.)

To all whom it may concern.-

Be it known that I, WRIGHT D. SMITH, of Detroit, in the county of Wayne and State of Michigan, have invented new and useful Improvements in Exhaust-Fans; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

The nature of this invention relates to certain new and useful improvements in the construction of exhaust-fans of that class which are usually employed for exhausting shavings, &c., from a mill. In the fans as ordinarily constructed, wherein the opening to the fancase through which the shavings are drawn is only upon one side of the case, the shaft upon which the fans are secured and its box are so located that there is a tendency in the operation of the fan for air to draw through the box into the fan-case, thereby withdrawing from the box the lubricant necessary for the safe running of the shaft, and this tendency also draws sparks, which may arise from an overheated box, into the case, whence such spar ks are thrown out with the shavings, having a tendency to ignite them and injure the premises. The object of this invention is to avoid these dangers and difficulties by so constructing the shaft-bearings and boxes with relation to the fan-case that there will be no tendency in the operations ofthe fan to draw air through the journal-boxes.

The invention consists in the peculiar construction of parts and their combinations and operation,as more fully hereinafter described.

Figure 1 is aplan showing a pair of fan-cases wherein the fans are run by means of a shaft and pulley common to both, one of the fancases being broken away to show the internal arrangement of the parts. Fig.2 is a vertical central section through one of the fan-cases. Fig. 3 is a detached perspective view of the support of the journal-boxes detached from the side of the case.

In the accompanying drawings, which form a part of this specification, A A represent the fan-cases, which may be of any desired construction adapted for exhaust-fans.

B represents the openings on the outer sides of the fan-cases, through which, by the vacuum created in such cases by the revolution of the fans 0, shavings or other like material are drawn into the cases.

D is a shaft, upon which is secured the pulley E, and upon each end of this shaft there is secured the fan 0.

F is a bracket, which supports the journalboxes G upon either side of the pulley E. This bracket is provided with a pair of horizontal wings, a, or braces, and a vertical brace, I), and these braces may be cast integral with the side of the fan upon which they are situated; or'they may be cast separateand secured thereto by bolts. The ends of the boxes which are adjacent to the case are set away from said case, leaving a space, a, between the ends of said boxes and the sides of the case. This bracket, with the fixed part of the box, may be cast together with the base of the brackets, which, when in place, rest against the outer face of the case, projecting beyond the end of the box to form the space 0, which I have already described, and the cap of the box should be coincident in length to the fixed part of the box below.

By this construction the tendency which has hitherto been found for air to be drawn through the journal-boxes into the fan-case is entirely avoided, as it can be more easllydrawn through a hole in the side of the case through which the shaft passes, and which of course must have an annular space around the shaft to prevent the latter from coming in contact and heating the case. There being no air passing through the box, as described, of course no lubricant is withdrawn by means of such air, and any heating of the journal or box is not communicated iujuriously to the interior ofthe fan-case.

What I claim as thy-invention is 1. A journal-box consisting of two halves, the lower of which is provided with horizontal wings a a, and a vertical brace, b, said wings and brace projecting be; 0nd the box, forming a space, 0, for the purpose set forth.

2. The combination, with an exhaust-fan, substantially as described, of a box, G, consisting of two halves, the lower of which is provided with wings a a and a brace, 1), projecting beyond the inner end of the box, for supporting said box on one side of the fancase, and forming a recess, 0, substantially as and for the purpose set forth. I

WRIGHT D. SMITH.

Witnesses:

H. S. SPRAGUE, E. 1. Scout. 

